US Patent No. 9,259,377 B2; Colgate-Palmolive has patented a method of preparing a dentifrice comprising a polymer matrix film with a low solubility flavorant in the following steps: forming a polymer matrix film in the substantial absence of a low solubility flavorant; wherein said polymer matrix comprises a water soluble polymer and a low solubility polymer additive; forming a dentifrice base comprising a low solubility flavorant; combining the polymer matrix film with the dentifrice base; and maintaining the combined polymer matrix film and dentifrice base for an amount of time suitable for an effective amount of said low solubility flavorant to transfer from said dentifrice base to said polymer matrix film. Flavorant is selected from the group consisting of menthol, spearmint oil, cinnamon oil, peppermint oil, clove oil, bay oil, thyme oil, cedar leaf oil, oil of nutmeg, oil of sage and oil of bitter almonds.